Fig. 3. (a) Plot of relative viscosity (η/η 0)1/3 of DNA versus r (r = [complex]/[DNA]) upon addition of 1 (Tris buffer). (b) Plot of relative viscosity of DNA with addition of 2 (1% DMSO, 99% Tris buffer). The intercalator ethidium bromide (EB) and the groove binder Hoechst 33258 (H33258) were included for reference in both experimental conditions.
